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Related Concept Videos

Testes: Histology01:27

Testes: Histology

A tough, fibrous membrane, the tunica albuginea, covers the testes, extending inward to form fibrous partitions or septa, dividing them into internal compartments called lobules. Each lobule has 1 to 3 tightly coiled seminiferous tubules where sperm production occurs. These tubules merge into a tubular network at the back of the testis, known as the rete testis. It connects to 15 to 20 efferent ductules, leading to the epididymis.
The spermatogenic cells, responsible for producing sperm, are...
Testes: Gross Anatomy01:19

Testes: Gross Anatomy

The testes, also known as testicles, are the male gonads. They are housed within the scrotum, a sac-like structure located beneath the penis. The scrotum's primary role is to regulate the temperature of the testes, which is crucial for sperm production.
Each testis is surrounded by the tunica albuginea, a dense connective tissue layer that provides structural support and protection. This layer is covered by an outer serous membrane called the tunica vaginalis, which helps reduce friction...
Testosterone: Functions and Regulation01:26

Testosterone: Functions and Regulation

The intricate hormonal interplay essential for male reproductive health begins with the release of gonadotropin-releasing hormone (GnRH) by the hypothalamus. This hormone prompts the pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). LH targets the Leydig cells in the testes, stimulating them to produce and release testosterone. In concert with testosterone, FSH acts on the Sertoli cells within the seminiferous tubules to facilitate the release of...
Sperm Transport01:15

Sperm Transport

The journey of sperm from its origin to the point of ejaculation begins within the seminiferous tubules of the testis. Here, Sertoli cells produce fluid that propels non-motile sperm through a series of conduits, starting with the straight tubules leading to the rete testis. This interconnected network of tubules acts as the initial pathway for sperm, guiding them into the efferent ductules and then into the epididymis for maturation.
The maturation phase occurs in the epididymis, where sperm...
Immune Surveillance by NK Cells and Phagocytes01:25

Immune Surveillance by NK Cells and Phagocytes

Immune surveillance is an integral part of the innate immune system, involving the continuous monitoring of peripheral tissues to detect and respond to pathogens, infected cells, or cancerous cells. This surveillance is conducted primarily by natural killer (NK) cells and phagocytes, which employ distinct but complementary mechanisms to identify and eliminate threats.
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
Spermatogenesis01:41

Spermatogenesis

Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male reproductive...

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Related Experiment Video

Updated: Jun 5, 2026

Isolation of Sertoli Cells and Peritubular Cells from Rat Testes
11:11

Isolation of Sertoli Cells and Peritubular Cells from Rat Testes

Published on: February 8, 2016

Role of macrophages in testis function.

Satoko Matsuyama1, Sudhanshu Bhushan2, Tony DeFalco3

  • 1Division of Developmental Biology, Reproductive Sciences Center, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States.

Current Topics in Developmental Biology
|June 3, 2026
PubMed
Summary
This summary is machine-generated.

Testicular macrophages are crucial for male reproductive health, supporting sperm production and hormone synthesis while maintaining immune balance. Understanding their role is key to addressing infertility and aging.

Keywords:
Blood-testis barrierImmune privilegeInflammationMacrophageSteroidogenesisTestis

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Last Updated: Jun 5, 2026

Isolation of Sertoli Cells and Peritubular Cells from Rat Testes
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Published on: February 8, 2016

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08:21

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Published on: April 29, 2015

Area of Science:

  • Reproductive Immunology
  • Male Reproductive Biology
  • Immunology

Background:

  • The testis performs dual roles: spermatogenesis and steroidogenesis.
  • It requires immune defense while tolerating self-antigens and suppressing inflammation.
  • Testicular macrophages are key immune cells within the testis.

Purpose of the Study:

  • To review testicular immune privilege components.
  • To detail testicular macrophage development, maintenance, and interactions.
  • To explore macrophage roles in testicular function, inflammation, and disease.

Main Methods:

  • Review of existing literature on testicular immunology and macrophages.
  • Synthesis of information on testicular immune privilege, including the blood-testis barrier.
  • Analysis of macrophage interactions with Leydig cells and germ cells.

Main Results:

  • Testicular macrophages influence steroidogenesis and spermatogenesis via mediators and phagocytosis.
  • Immune privilege is maintained by the blood-testis barrier, immunosuppressive factors, and specific immune cells.
  • Macrophages interact with Leydig cells and are involved in testicular homeostasis.

Conclusions:

  • Testicular macrophages are central to immune regulation and reproductive function.
  • Dysregulation of macrophages is linked to infertility and aging.
  • Targeting testicular macrophages offers potential therapeutic strategies for reproductive diseases.